Self-vulcanizing boot for tire casings



Jan. 2, 1923.

E. Nl. SABIN.

SELF vULcANlzlNG BOOT FOR TIRE CASINGS.

FILED OCT. 3, i921.

l l Ha/n@ 'QQJW' EY ATTC R N EY WlTNESS:

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Patented Jan. 2, i923.

STATES Latin,-

PATNT OFFICE.

EMERY M. SABIN, OF KANTNER, PENNSYLVANIA.

Application filed October 3, 1921. Serial No. 505,072.

To u/ Hmm if muy concern lie. itlinown that l. lunin M. Sama. a citizen, ot' the United States. residing at liantner. in the county ot' Somerset and State ot' Pennsylvania` have invented new and use"`ul lmprovemeuts in Self-Vulcaniaing Boots for Tire tasings. ot' which the following is a specitication.

.\ly present invention has reference to a sel'li-vulcauizing boot designed to be arranged in a tire casing to cover acut or puncture therein and also designed to be compressed against the casiu l` by an intlatcd inner tube. the outer tace ot the boot being treated with a cement whereby1 road pressure against the tire casing and the air pressure exerted b v the inner tube will ause the boot to be securely attached to the inner tace ot' the casing to remain a permanent part thcreol and thus overcome the necessity ot vulcanizing the tire when damaged.

l'urther object is: to produce a selt vulcanizing boot for tire casings which will be. made in various sizes and proportions to accurately tit in varying sized tire. casings. which shall be ol a comparatively simple construction. cheaply manutzwtured. readily applied and which will be thoroughly etlie cient for the purpose for which it is dcvised.

further object is to produce a self-vulcanizmg boot t'or tire casings designed. when ar `anged therein to aftix itseltl thereto in as cllicient manner as were the same subjected to heat and which will materially reinforce the casing at and adjacent to cuts or punctures therein, and thereby materially proi long the lit'e of the casing.

rl`he foregoing, and other objects which will appear as the nature ot thev invention is better understood. may be accomplished by a const ructiou. combination and operative association ol: parts. `such as is disclosed bv the drawings which accompany and whici form part ot this specilicatimi.

ln the drawings `Figure 1 is a fragmentary substantially vertical longitudinal sectional view through a portion ot' a tire casing having' my improvement applied therein.

Figure is Va transverse sectional view through the tire casing and improvement.

.ln the showing of' the drawings. a tire easing 1 damaged by one or a plurality of cuts or punctnres 2. The casing 1 is of the ordinaryT construction. and my improvement is designed to be received therein and.Y

to vautomatically attach itself thereto in a manner which will presently be apparent.

The improved boot essentially comprises an outer layer ot' tread rubber which is iii-- dicated by the numeral 3. and which, whe: in applied position. contorms itself to boti the cross sectional and longitudinal'contour of the casing 1. rl`he outer tread rubber member 3 ot' the improvement is thickest at its center. and gradually decreases in thicle ness trom its said center to its ends and edges. as clearly disclosed in Figures 1 and 2 of the drawings. By thickening the member or section 2S at the center thereof. it will be noted that the same will materiallyY reinforce the tire casing atthe portion thereot uiost susceptible to wear. that is. ot course7 the treznlsurt'ace ot the said casing. and conseipicntly my improvement not only closes cuts or punctures. but materially strengthens the tire casinf.

rl`he tr aid rubber section 3 ot the improvenient .has its outer tace treated with a coat ing otsuitable cement which will adhesively secure the same to the tire casing auto uiatieally and in as eti'ective manner as were the same vulcanized thereto by the usual heated process. rl`his is accomplished by the road pressure to which the tire easing is subjected. and the resistance ot such road pressure by the inflated inner tube bearing against the inner tace ot' the boot. s the inner tube isot the usual construction and doesI not t'orln part4 ot this invention. l have notv deemed it necessary to illust-rate thc same.

Yulcanized or adhesively secured to the inner concaved tace ot the section 3 ot the boot is a layer of tire building t'abric t. The tire building fabric is ot a materially greater width than that of the member or sect-ion to which it is connected. the said fabric. as disclosed in Figure .2 ot the drawings being ot a size whereby the sides thereof may be brought over the sides ot the casing outwardly over the beaded edges thereof and trom thence against the outer tace of the said beads so that the Same may be tight-ly clamped beneath the bead. the tire.

Vbead and wheel rim being so arranged as to cover a hole or rim out 1n the said fabric. The portions of the section 4 projecting beyond the outer member or sect-ion 3. l will. for the sake of convenience. hereinafter refer to as aprons. and have designated the lltl ized any desired number of other layers, the

said layers being preferably constructed ofv the usual cloth and rubber. the inner layer` for distinction, being indicated by the numeral 6.. The layers 6 gradually decrease in width from the inner to the outermost section thereof so that the inner cont-our of the boot is substantially in conformity to the cross sectional rounded contour of the inner tube when the latter is arranged in the casing.

The rubber tread surface of the boot, when vulcanized ,to the casing in the` automatic manner above set forth, acts in a manner similar to the outer rubber tread surface of the casing; The section 3 of the boot prevents the entrance of moisture, sand or dirt through the cut or puncture to the interior of the easing, while the fabric portion of the boot reinforces and strengthens the said rubber section 3 so that the device` as a whole,` will have a strength and durabilityy substantially equal to the tread portion of a perfectly good tire casing.

Having described the invention, I claim:

A self vulcanizing boot designed to be in the drawings. 011- arranged in a tire casing to cover punctures and to reinforce said casing, said boot coinprising an outer layer of tread rubber, which conforms to the contour of the casing, the outer tread rubber member being thickest in its center and gradually decreasing in thickness from the center to its ends and edges, the tread rubber being adhesively secured to the inner concave face of the boot, a layer of tire building fabric arranged around the inner ends of the casing and being of a greater width than the outer tread member to which it is connected, the fabric being of a size whereby the sides thereof may be brought over the sides of the easing outwardly over the beaded edges thereof and from thence against the outer face of the beads for tightly clamping the saule beneath the beads, a plurality of cloth and rubber layers secured on the inner face of'its fabric, said layers gradually decreasing in width from the inner and outermost section thereof. so that the inner contour of the boot is substantially in conformity to the cross section around the contour of the inner tube when the latter is arranged in the casing. i

In testimony whereof I aflix my signature.l

EMERY M. SA'BIN. 

